feat: Add Playbook Manager, Saved Searches, and Timeline View components

- Implemented PlaybookManager for creating and managing investigation playbooks with templates.
- Added SavedSearches component for managing bookmarked queries and recurring scans.
- Introduced TimelineView for visualizing forensic event timelines with zoomable charts.
- Enhanced backend processing with auto-queued jobs for dataset uploads and improved database concurrency.
- Updated frontend components for better user experience and performance optimizations.
- Documented changes in update log for future reference.

backend/app/main.py

@@ -196,3 +196,12 @@ async def root():
             "openwebui": settings.OPENWEBUI_URL,
         },
     }
+
+
+@app.get("/health", tags=["health"])
+async def health():
+    return {
+        "service": "ThreatHunt API",
+        "version": settings.APP_VERSION,
+        "status": "ok",
+    }